1403/01/09
حامد سلیمی کناری

حامد سلیمی کناری

مرتبه علمی: استادیار
ارکید:
تحصیلات: دکترای تخصصی
اسکاپوس:
دانشکده: دانشکده مهندسی و فناوری
نشانی:
تلفن: 01135305105

مشخصات پژوهش

عنوان
Effects of chain length of the cross-linking agent on rheological and swelling characteristics of dextran hydrogels
نوع پژوهش
JournalPaper
کلیدواژه‌ها
Dextran hydrogels Chemical crosslinkers Rheology Swelling Percolated networks
سال
2018
مجله CARBOHYDRATE POLYMERS
شناسه DOI
پژوهشگران Erfan Dashtimoghadam ، Mohammad Imani ، Bo Nyström ، Hamed Salimi-Kenari ، Faeze Mollaie

چکیده

Rheological characteristics during chemical gelation of semidilute solutions of dextran in the presence of crosslinking agents of different chain length are reported. Effects of cross-linker chain length on the gel point, structure of the gel network, and mechanical properties were investigated. The rheological results disclose that for all systems, the gelation process proceeds over a long time and both the complex viscosity and the power law exponent reveal that solid-like gel structures are formed in the post-gel region. Water absorption behavior of the gels was studied and the results were interpreted by using a kinetic model indicating that the swelling is diffusion controlled. The findings clearly show that the rheological characteristics, such as the time of gelation and gel strength of dextran hydrogels can be tuned by changing the chain length of the cross-linker agent. Furthermore, the swelling results also exposed significant differences between gels cross-linked with the two different crosslinker agents.